Last year, graphic novel sales drastically outpaced the growth rate of other print publishing. More and more readers are drawn to the marriage of art and storytelling that goes into books like Sea Sirens, a new middle-grade novel about a Vietnamese-American surfer and her water-loving cat. Spine sat down with Eisner Award-winning illustrator Janet K. Lee as well as writer and co-founder of Alpha Girl Comics Amy Chu to talk about bringing their graphic novel to life.